Convert the given statement into passive voice. 

"Sneha applied the brakes of the car immediately."

In the active voice, the subject performs the action. The given statement "Sneha applied the brakes of the car immediately" is in active voice as the subject of the statement Sneha is the doer of the verb "applied". We need to make it into the passive voice where the subject receives the action in the name of the verb. In the passive voice, the subject will be shown as affected by the verb.The given statement is in simple past form. While changing it into the passive voice format, was or were and the past participle form of the verb have to be used. Since "the brakes of the car" is in plural form, "were" should be used. Option C and D can be eliminated based on this. The passive voice does not require the usage of "had". Hence, option B is the right answer.