Given below are two statements, one labelled as Assertion (A) and the other labelled as **Reason (R):** Assertion (A):** The boundaries of Kingdom Protista are not well-defined. **Reason (R):** What may be 'a photosynthetic protistan' to one biologist may be 'a plant' to another, as this kingdom links unicellular organisms with multicellular kingdoms. Select the correct answer using the codes given below:

Options:

• A: Both A and R are true but R is not the correct explanation of A
• B: Both A and R are true and R is the correct explanation of A
• C: A is true but R is false
• D: A is false but R is true

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