Correct Answer: (d) 1, 2, 3 and 4
Note: Sanskrit literature reached its apogee in the Gupta period. This era is known for equal writing of prose and poetry. Amarakosh by Amar Singh, Kamasutra by Vatsyana, Meghadutam by Kalidasa and Mudrarakshasa by Vishakhadatta are among the classic literature composed during this period.