NEW DELHI—In a massive Cabinet revamp, Indian Prime Minister Narendra Modi dropped 12 senior Cabinet ministers on Wednesday and inducted a younger team aimed at refurbishing his government’s image after widespread criticism of its handling of the COVID-19 pandemic. Health Minister Dr. Harsh Vardhan, whose response to the epidemic came under close examination, Education Minister Ramesh Pokhriyal Nishank, Law and Electronics and Information Technology Minister Ravi Shankar Prasad, and Environment Minister Prakash Javadekar were among those who resigned hours ahead of the reshuffle. Fifteen Cabinet ministers and 28 junior ministers were sworn in by President Kovind at a ceremony in the presidential palace on Wednesday. Eight junior ministers were elevated to Cabinet rank. The portfolios of the new ministers were expected to be announced later Wednesday or Thursday. Modi retained Home Minister Amit Shah, Defense Minister Rajnath Singh, Finance Minister Nirmala Sitharaman, and External Affairs Minister Subrahmanyam Jaishankar. It is …