The Subsidiary Alliance and Doctrine of Lapse were important British policies that helped the East India Company expand its control over India. Under the Subsidiary Alliance, Indian rulers had to accept British troops, pay their expenses, and give up independent foreign relations. The Doctrine of Lapse allowed the British to annex any Indian state where the ruler died without a natural heir. These policies weakened Indian kingdoms and increased British power. Questions from these topics are frequently asked in competitive exams like JKSSB, SSC, UPSC, and State PSCs, making them very important for MCQs preparation.