Which of the following molecules will be chiral?

What is the possible number of optical isomers for a compound containing $2$ dissimilar asymmetric carbon atoms?

Which of the following statements is false about the given structures?

Total number of optically active compounds from the following is $......$

Explain the following terms:
$(i)$ Plane polarised light
$(ii)$ Optical activity
$(iii)$ Chirality
$(iv)$ Chiral centre (atom)
$(v)$ Enantiomers
$(vi)$ Diastereomers
$(vii)$ Meso compounds
$(viii)$ Plane of symmetry and Achiral molecule
$(ix)$ Centre of symmetry

Which of the following compounds is optically active?