While punctuating a sentence it is important to capitalize the first letter of the sentence. Also, it is important to capitalize the proper nouns such as the name of a person, place or organization. The first letter in titles is also capitalized. In the given sentence, the proper noun is ‘Sundhanshu’ therefore the ‘s’ in the beginning of his name needs to be capitalized, and cannot be in lowercase. Therefore, option A is incorrect. Further, the basic rules in punctuating a sentence are that we use a full stop for a declarative sentence, a question mark for an interrogative sentence and an exclamation mark for an exclamatory sentence. The given sentence poses a question as to where Dr. Sundhanshu went at noon. Hence it is an example of an interrogative sentence. So it has to be punctuated with a question mark and not a full stop or exclamation mark. Thus option C is correct, whereas options B and D are incorrect.