The correct answer is (c) 1835.
The double-lock system was introduced in Treasury management during colonial rule in Uttarakhand in 1835. This system was introduced to prevent fraud and embezzlement in the treasury. Under this system, two keys were required to open the treasury chest. One key was held by the treasury officer and the other key was held by the accountant. This system made it difficult for anyone to tamper with the treasury funds without the knowledge of both the treasury officer and the accountant.
The other options are incorrect. Option (a) is incorrect because the double-lock system was introduced in 1835, not 1824. Option (b) is incorrect because the double-lock system was introduced in 1835, not 1822. Option (d) is incorrect because the double-lock system was introduced in 1835, not 1829.