Making of mamidi tandra takes how many weeks? 

Mamidi tandra is made from ripe mangoes. Mamidi tandra is also known as aam papad. Making of mamidi tandra requires around four weeks. First, the pulp of mango is collected and finely crushed. Jaggery and sugar are added to the pulp. Further, it is spread in the sunlight on a mat. While spreading it, one has to make sure that it is spread in a thin layer and that there should not any lumps. 

Therefore, the correct answer is (C).