Suresh going by your definition of child,the father of nation Gandhi should first be prosectued for child marriage,but doing so would be ridiculuos because the early genrations even if its just 100 yrs ago had a different level of biological and mental maturity. Now dont bluff this is a child marraige,Gandhi had his first son just 3 years of this marriage
Check the age of kasturbha Gandhi history on University of California, Los Angeles
