Final answer:
The tank in Amritsar was excavated by Guru Ramdas Ji, the fourth Sikh Guru. This site eventually became the Golden Temple, a central Sikh place of worship. Guru Tegh Bahadur, the ninth Guru, was also a Sikh leader.
Step-by-step explanation:
The tank in Amritsar, which the student is referencing, was excavated under the guidance of Guru Ramdas Ji, the fourth of the Sikh Gurus. Consequently, the correct answer to who got the tank excavated in Amritsar is C) Guru Ramdas Ji. This tank later became the central part of the Harmandir Sahib, also known as the Golden Temple, which is a significant place of worship for Sikhs. To provide additional context to the student's inquiry regarding Sikh leadership, Guru Tegh Bahadur, mentioned in association with Aurangzeb, was the ninth Sikh Guru and he was indeed a leader of the Sikh religion, which answers the subsidiary query related to Sikh history.