The specific requirements of the ‘start-ups’ can be fulfilled through:

The correct answer is D. Each of the three routes meets a different part of a start-up's funding need, so the question has all three as valid answers.

• Angel investors are individuals who put in early, risky capital, usually at the idea or prototype stage, when banks will not lend. They often bring mentoring and networks too.
• Venture capital comes from professional funds that invest larger sums in companies with proven traction and high growth potential, in return for equity and a say in governance. In India, VC and angel funds are regulated as Alternative Investment Funds under SEBI's 2012 framework.
• Crowdfunding raises small amounts from a large number of people, either as donations, pre-orders, or, in regulated form, equity or debt. It also helps validate demand.

The core concept is the funding life cycle: seed, early, and growth stages each need a different kind of capital, and one instrument rarely fits all. For Mains GS-III, this links to Startup India (2016), credit access for MSMEs, and the question of how to widen risk capital beyond metro cities.

Trap: Aspirants often pick a single 'best' source and mark A, B or C alone. The question asks which sources can fulfil the requirements, and each one can, so 'All the above' is correct.