Find the next term in the alpha-numeric series

D4T, F9R, H20P, J43N, ...

L 90 L

The correct answer is: option (3) i.e. L90L

D4T, F9R, H20P, J43N, ...

Here, the Pattern follows is:

1st alphabet of the series:

D ⇒ E ⇒ F ⇒ G ⇒ H ⇒ I ⇒ J ⇒ K ⇒ L

Middle term of the series:

⇒ First no.(4) × 2 + 1 = (9)

⇒ Second no.(9) × 2 + 2 = (20)

⇒ Third no.(9) × 2 + 3 = (43)

⇒ Fourth no.(43) × 2 + 4 = 90

3rd alphabet of the series:

T ⇐ Q ⇐ R ⇐ Q ⇐ P ⇐ O ⇐ N ⇐ M ⇐ L

So, the correct answer will be: L 90 L