Select the option that expresses the given sentence in reported speech.

"Is the door closed?" Alka asked Tarun.

Alka asked Tarun whether the door was closed.

The correct option is:

Alka asked Tarun whether the door was closed.

The other options are incorrect because they do not follow these rules:

• Alka asked Tarun is the door close. - This sentence does not change the present tense to the past tense.
• Alka asked Tarun if the door is closed. - This sentence uses the present tense instead of the past tense.
• Alka asked Tarun whether she closed the door. - This sentence changes the subject from "the door" to "she."