Please choose the correct solution to the question: When making a homemade hand warmer what is a good material to put in the pouch?

Solution1: Uncooked rice in the pouch will warm up after 30 secs in the microwave and stay warm for 30 mins.

Solution2: Uncooked flour in the pouch will warm up after 30 secs in the microwave and stay warm for 30 mins.

Answer format: solution1/solution2
Answer: solution1