Which of the following sentences have modal verbs? (A) Rohit comes to the class regularly. (B) Meenal sits to sing every morning. (C) We must respect our parents. (D) Mohan will visit the doctor after work. (E) Maghna's visit to the institute was fruitless. Choose the correct answer from the options given below:

(A) and (D) Only (D) and (E) Only (A) and (C) Only (C) and (D) Only

(C) and (D) Only

The correct answer is Option (4) - (C) and (D) Only