In these sentences, we need to underline proper nouns. Proper nouns are specific names of people, places, or organizations, and they are always capitalized. Let's identify them in each sentence:
Sachin Tendulkar is the great cricketer of India .
'Sachin Tendulkar' is a proper noun as it refers to a specific person.
'India' is a proper noun as it refers to a specific country.
The Red Fort is in Delhi .
'Red Fort' is a proper noun as it refers to a specific monument.
'Delhi' is a proper noun as it refers to a specific city.
Baisakhi is a festival in Punjab .
'Baisakhi' is a proper noun as it refers to a specific festival.
'Punjab' is a proper noun as it refers to a specific state.
Mr. Sharma teaches English Grammar.
'Mr. Sharma' is a proper noun as it refers to a specific person.
Indira Gandhi was the Prime Minister of India .
'Indira Gandhi' is a proper noun as it refers to a specific person.
'India' is a proper noun as it refers to a specific country.
The Taj Mahal is situated in Agra .
'Taj Mahal' is a proper noun as it refers to a specific monument.
'Agra' is a proper noun as it refers to a specific city.
Maulan Azad was a freedom fighter.
'Maulan Azad' is a proper noun as it refers to a specific person.
Rekha lives in Kolkata .
'Rekha' is a proper noun as it refers to a specific person.
'Kolkata' is a proper noun as it refers to a specific city.
Remember, proper nouns always start with a capital letter and denote a unique entity, making it easy to identify them as specific names.