Find the next two terms of the series:
The given series is: \( A, C, F, J, ? \).
(A) O
(B) U
(C) R
(D) V
Choose the correct answer from the options given below:
Find the number of triangles in the given figure.

Match List-I with List-II.
| List-I | List-II |
|---|---|
| A. \(\dfrac{d}{dx}(\cos^{-1}x)\) | I. \(\dfrac{1}{1+x^2}\) |
| B. \(\dfrac{d}{dx}(\cot^{-1}x)\) | II. \(\dfrac{1}{|x|\sqrt{x^2-1}}\) |
| C. \(\dfrac{d}{dx}(\cosec^{-1}x)\) | III. \(\dfrac{-1}{\sqrt{1-x^2}}\) |
| D. \(\dfrac{d}{dx}(\sec^{-1}x)\) | IV. \(\dfrac{-1}{|x|\sqrt{x^2-1}}\) |
Choose the correct answer from the options given below:
Match List-I with List-II.
| List-I | List-II |
|---|---|
| A. \(\dfrac{d}{dx}(\cos^{-1}x)\) | I. \(\dfrac{1}{1+x^2}\) |
| B. \(\dfrac{d}{dx}(\cot^{-1}x)\) | II. \(\dfrac{1}{|x|\sqrt{x^2-1}}\) |
| C. \(\dfrac{d}{dx}(\cosec^{-1}x)\) | III. \(\dfrac{-1}{\sqrt{1-x^2}}\) |
| D. \(\dfrac{d}{dx}(\sec^{-1}x)\) | IV. \(\dfrac{-1}{|x|\sqrt{x^2-1}}\) |
Choose the correct answer from the options given below: