The flowers are zygomorphic in:

(a) Mustard

(b) Gulmohar

(c) Cassia

(d) Datura

(e) Chilly

Choose the correct answer from the options given below:

Concept: 

• When a flower can be divided into two similar halves only in one particular vertical plane, it is called zygomorphic symmetry.
• When a flower can be divided into two equal radial halves in any radial plane passing through the center, it is said to be actinomorphic symmetry. 
• Asymmetry means dividing any object into two parts that are not equally divided. 

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Explanation:

Option 1: Datura and chilly show actinomorphic flowers. zygomorphic: Cassia.

Option 2: Mustard show actinomorphic flowers. zygomorphic: Gulmohar, and Cassia.

Option 3: Zygomorphic for e.g. Pea, Gulmohar, bean, Cassia.

Option 4: Datura and chilly show actinomorphic flowers. 

So, the correct answer is Option 3.