Which district of Kerala has highest population density?
[A]Idukki
[B]Allappuzha
[C]Ernakulam
[D]Malappuram

Malappuram
The total population of Kerala as per Census 2011 is 3,34,06,061 with 1,60,27,412 males and 1,73,78,649 females. The most populated district in Kerala is Malappuram (Population: 41,12,920) and the least populated district is Wayanad (Population : 8,17,420). Among the States of India; Kerala stands at 12th position in terms of population. Source: Census 2011 Data