Porcupine is one of the animals protected under the Wildlife (Protection) Act, 1972. The Act categorizes species into different schedules, and porcupines are likely to be listed in one of these schedules, affording them legal protection against hunting, poaching, or other forms of exploitation. The protection is aimed at conserving biodiversity and ensuring the well-being of various wildlife species.

It's important to note that the specific categorization of animals can be subject to amendments, so it's advisable to refer to the latest version of the Wildlife (Protection) Act or consult relevant authorities for the most up-to-date information.

INS Shalki is the first indigenously built submarine in India. It is part of the Shishumar class of submarines and was commissioned into the Indian Navy on December 7, 1991. INS Shalki, along with its sister submarine INS Shankul, marked a significant achievement in India's naval capabilities as it was built at the Mazagon Dock Limited in Mumbai, showcasing the country's growing capacity to design and construct submarines domestically.