sentence: There he won five gold medals in Vyākaraṇa, Sāṅkhya, Nyāya, Vedānta and Sanskrit Antyākṣarī out of eight.
modified: fix grammar: There he won five gold medals on Vyākaraṇa, Sāṅkhya, Nyāya, Vedānta and Sanskrit Antyākṣarī out of eight.