Choose the correct option.
A. (__i) is used to initiate flowering and for synchronising fruit set in pineapples.
B. (__ii) is also known as stress hormone.
C. (__iii) is used to induce early seed production in conifers and for increasing sugar yield in sugarcane

Options

A. (i) Ethylene, (iii) Auxin
B. (ii) Ethylene, (iii) Cytokinin
C. (ii) ABA, (iii) GA
D. (ii) GA, (iii) ABA

Answer

To solve the question, we need to identify the correct plant growth regulators (PGRs) that correspond to the statements given in the question. Let's break down each statement step by step.

### Step 1: Analyze Statement A
- The statement says that something is used to initiate flowering and synchronize fruit set in pineapples.
- The hormone known for this function is **ethylene**. Ethylene is a gaseous plant hormone that plays a crucial role in the ripening of fruits and can induce flowering in certain plants, including pineapples.

### Step 2: Analyze Statement B
- The statement mentions a hormone that is also known as the stress hormone.
- The hormone that fits this description is **abscisic acid (ABA)**. ABA is known to be involved in plant responses to stress, such as drought and salinity, hence it is often referred to as the stress hormone.

### Step 3: Analyze Statement C
- This statement refers to a substance used to induce early seed production in conifers and to increase sugar yield in sugarcane.
- The hormone that is used for these purposes is **gibberellin**. Gibberellins are known to promote seed germination and are also used to enhance sugar production in sugarcane.

### Conclusion
Based on the analysis:
- (__i) Ethylene
- (__ii) Abscisic acid
- (__iii) Gibberellin

Thus, the correct answer is:
**Option 3: Ethylene, Abscisic acid, Gibberellin**