Question:
Where was Prasanta Chandra Mahalanobis educated in Jul, 1905?

Context:
 Prasanta Chandra Mahalanobis attended King's College from Jan, 1913 to Jan, 1915. 
 Prasanta Chandra Mahalanobis attended Brahmo Boy's School from Jan, 1904 to Jan, 1908. 
 Prasanta Chandra Mahalanobis attended Presidency University from Jan, 1908 to Jan, 1912.

Answer:
Brahmo Boy's School