The correct answer is D.
Pawan said to me, “If I hear any news, I’ll phone you.” This is a simple sentence with a conditional clause. The conditional clause is “if I hear any news” and the main clause is “I’ll phone you.” The conditional clause is in the past tense, but the main clause is in the future tense. This is because the conditional clause is a hypothetical situation. Pawan is saying that if he hears any news, he will phone me. He is not saying that he has heard any news, or that he will definitely phone me. He is simply saying that if he does hear any news, he will phone me.
Option A is incorrect because it uses the future tense in both the conditional clause and the main clause. This is not correct because the conditional clause is a hypothetical situation.
Option B is incorrect because it uses the future tense in the conditional clause and the present tense in the main clause. This is not correct because the conditional clause is a hypothetical situation, and the main clause is a statement of fact.
Option C is incorrect because it uses the past tense in the conditional clause and the past tense in the main clause. This is not correct because the conditional clause is a hypothetical situation, and the main clause is a statement of fact.