Which one of the following statements is not true?

Options

A. The flowers pollinated by flies and beetles secrete foul odour to attract them
B. Honey is made by bees by digesting pollen collected from flowers
C. Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups
D. Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.

Answer

To determine which statement is not true, we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- The first statement claims that flowers pollinated by flies and beetles secrete foul odors to attract them.
- This statement is **true**. Flies and beetles are attracted to decaying matter, and flowers that rely on these insects for pollination often emit foul odors to lure them in.

2. **Analyze the Second Statement:**
- The second statement states that honey is made by bees by digesting pollen collected from flowers.
- This statement is **not true**. Bees primarily collect nectar from flowers, which is a sugary liquid. They use nectar to produce honey, not pollen. Pollen is collected for protein and nutrients, but it is not the source of honey.

3. **Analyze the Third Statement:**
- The third statement mentions that pollen grains are rich in nutrients and are used in the form of tablets and syrups.
- This statement is **true**. Pollen grains are indeed rich in proteins and other nutrients, and they are sometimes used in health supplements.

4. **Analyze the Fourth Statement:**
- The fourth statement indicates that pollen grains of some plants cause severe allergies and bronchial afflictions in some people.
- This statement is also **true**. Certain pollen grains are known allergens and can trigger allergic reactions and respiratory issues in sensitive individuals.

### Conclusion:
From the analysis, the only statement that is not true is the **second statement**, which incorrectly claims that honey is made by bees by digesting pollen.

### Final Answer:
The statement that is not true is: "Honey is made by bees by digesting pollen collected from flowers."

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