Which of the following is a precipitation reaction?
CuSOâ‚„(aq) + BaClâ‚‚(aq) → BaSOâ‚„(s) + CuClâ‚‚(aq)
Fe(s) + CuSOâ‚„(aq) → FeSOâ‚„(aq) + Cu(s)
2Alâ‚‚O₃(l) → 4Al(l) + 3Oâ‚‚(g)
CuO + Hâ‚‚ → Hâ‚‚O + Cu
The diagram of the human alimentary canal is given below. Select the option that shows the correct matching of Column I with Column II
| Column I | Column II |
| a | i) Villi absorb water from food |
| b | ii) Length depends on food the organism eats |
| c | iii) Helps in emulsification of fats |
| d | iv) No digestion |
a-iii, b-ii, c-i, d-iv
a-i, b-ii, c-iii, d-iv
a-ii, b-iii, c-iv, d-i
a-iv, b-i, c-ii, d-iii
Study the given diagram carefully and answer the question. The numbers in different sections indicate the number of persons working in a film industry. 
How many female actors are also models?