DIRECTION: In the following questions, a statement of assertion (A) is followed by a statement o...

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DIRECTION: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
a. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
b. Both assertion (A) and reason (R) are true but reason \( (R) \) is not the correct explanation of assertion (A).
c. Assertion (A) is true but reason (R) is false.
d. Assertion (A) is false but reason (R) is true
Assertion: \( \mathrm{ABC} \) and \( \mathrm{DEF} \) are two similar triangles such that \( \mathrm{BC}=4 \mathrm{~cm}, \mathrm{EF}=5 \mathrm{~cm} \) and area of \( \triangle \mathrm{ABC}=64 \mathrm{~cm}^{2} \), then area of \( \triangle \mathrm{DEF}=100 \mathrm{~cm}^{2} \).
Reason: The areas of two similar triangles are in the ratio of the squares of the corresponding altitudes.
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