Directions: In Question Numbers 19 and 20, a statement of Assertion (A) is followed by a statement of Reason (R).…

Directions: In Question Numbers 19 and 20, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option from following: (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 (A): For an acute angle $\theta$, $\sin \theta = \frac{3}{5} \implies \cos \theta = -\frac{4}{5}$. Reason (R): For any value of $\theta$, $(0^\circ \le \theta \le 90^\circ)$ $\sin^2 \theta + \cos^2 \theta = 1$.