When was her deafness first noticed? When was it confirmed?

Q. The first thing Elizabeth noticed about Jane when they met at the station was _____.

Q. How old was Muniya, when
(a) she first sat up? ____________
(b) she got her first tooth? ____________

Q. Rigor Mortis was first noticed in?

Q. Sex chromatin was first noticed in

Q. Sonal made a toy as shown in the picture.
Figure
While playing she noticed that when toy C was brought near toy A, it ran away. But when toy B was brought near toy A, it ran towards him. Explain Sonal's observations.