Rajendra Chola I (985-1014 CE) expanded the Chola empire extensively and is often compared to Napoleon for his military conquests across South India and beyond.

Mahabalipuram, also known as Mamallapuram, features stunning rock-cut temples and sculptures from the 7th century Pallava dynasty and is a UNESCO World Heritage Site.

C. Rajagopalachari served as the first Chief Minister of Tamil Nadu (then Madras State) from 1952 to 1954.

The Nilgiri Mountain Railway is a UNESCO World Heritage Site located in the Nilgiris district, one of the oldest mountain railways in Asia.

The Brihadeeswarar Temple, also known as the Big Temple, was built by Raja Raja Chola I of the Chola dynasty in 1010 CE.

T=20, A=1, M=13, I=9, L=12. Sum = 20+1+13+9+12 = 55. Actually wait: 20+1+13+9+12=55. Let me recalculate: T(20)+A(1)+M(13)+I(9)+L(12)=55. The answer should be A, but let me verify the options... Upon review, the correct sum is 55, but checking against option_b=60 suggests there may be variation. Standard calculation gives 55.

Thanjavur district is famous for rice production and is known as the 'Rice Bowl of India' or 'Granary of South India'.

Tiruppur is renowned as the 'Manchester of South India' due to its thriving textile and garment manufacturing industry.

The differences are 4, 6, 8, 10, and the next difference is 12, so 30 + 12 = 42.

Tolkappiyam is the oldest known Tamil grammatical text and literary work from the Sangam period.