d. Who are Brahma, Vishnu and Shiva?

God is one, however God manifests in different forms. Hindus believe in the trinity (Sanskrit: त्रिमूर्ति trimūrti) of gods (three main forms): Brahma (the creator), Vishnu (the preserver), and Shiva (the dissolver). The trinity is the triple deity of supreme divinity Ishwara or Parmatma.

Other reading material: https://en.wikipedia.org/wiki/Trimurti, ^[2][3][4][5]

Relevant videos: Swami Nikhil Anand Hinduism Q & A: Who are Bramha Vishnu & Shiva , Bho Shambho Shiva Shambho (Lyrics & Meaning) – Aks & Lakshmi, Padmini Chandrashekar,

Contributor: Nilesh Chaudhary