According to studies, the Tumma-lapalle mine in Andhra Pradesh is estimated to have a Uranium reserve of 1.5 lakh tonnes. This means that there could be approximately 1.5 lakh tonnes of Uranium located in the mine.
Option 1 states that the Uranium reserve is 1 lakh tonnes, which is lower than the correct answer. Option 3 suggests that the reserve is 2 lakh tonnes, which is higher than the correct answer. Option 4 states that the reserve is 2.5 lakh tonnes, which is also higher than the correct answer.
Therefore, the correct answer is option 2, as it aligns with the studies indicating a Uranium reserve of 1.5 lakh tonnes in the Tumma-lapalle mine.