Read the statements given below. Which of the following statements is / are incorrect ?
I. Amniocentesis , a procedure which involves the analysis of yolk cells , has been banned by the government to prevent female foeticide.
II. The oral contraceptives pill ' saheli ' was developed by the central During Research Institute ( CDRI ) situated in the city of Ludhiana .
III. Spermicidal Creams , jellies , and foams are usually used with natural methods of contraception to increase their efficiency .
IV . Progesterone or progesterone - estrogen combination can also be used as implants under the skin for contraception purpose .

Options

A. I and III
B. I , II and IV
C. I,II and III
D. III and IV

Answer

To determine which statements are incorrect, we will analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** Amniocentesis, a procedure which involves the analysis of yolk cells, has been banned by the government to prevent female foeticide.

- **Analysis:** Amniocentesis is a medical procedure used to obtain amniotic fluid for testing. It is primarily used to analyze fetal chromosomes and detect genetic disorders. The statement incorrectly mentions "yolk cells," which are not involved in this procedure. Therefore, this statement is **incorrect**.

### Step 2: Analyze Statement II
**Statement II:** The oral contraceptive pill 'Saheli' was developed by the Central Drug Research Institute (CDRI) situated in the city of Ludhiana.

- **Analysis:** The oral contraceptive pill 'Saheli' was indeed developed by the Central Drug Research Institute (CDRI), but CDRI is located in Lucknow, not Ludhiana. Therefore, this statement is also **incorrect**.

### Step 3: Analyze Statement III
**Statement III:** Spermicidal creams, jellies, and foams are usually used with natural methods of contraception to increase their efficiency.

- **Analysis:** Spermicidal creams, jellies, and foams are actually classified as barrier methods of contraception, not natural methods. They are used to prevent sperm from reaching the egg when used in conjunction with barrier methods like condoms. Thus, this statement is **incorrect**.

### Step 4: Analyze Statement IV
**Statement IV:** Progesterone or progesterone-estrogen combination can also be used as implants under the skin for contraception purposes.

- **Analysis:** This statement is correct. Hormonal contraceptives, including progesterone and combinations of progesterone and estrogen, can be administered as implants under the skin to prevent pregnancy. Therefore, this statement is **correct**.

### Conclusion
Based on the analysis:
- **Incorrect Statements:** I, II, III
- **Correct Statement:** IV

Thus, the incorrect statements are **I, II, and III**.