In a child, one should be worried if-
Stammering occurs at 3 years
Lack of Toilet control at 2.5 years
Teeth do not erupt by 11 months
Social smile absent by 10 weeks
Ans. is 'd' i.e., Social smile absent by 10 weeks o Social smile develops by 2 months About other options o Delayed eruption is usually considered when there are no teeth by approximately 13 months of age --- Nelson o Toilet control develops by 3 years when child can withhold and postpone his bowel movement --- O.P. Ghai o Stammering may occur at 3 years --- Neeraj Ahuja