JEE Advanced Model Paper 5 with solutions for online practice

Answer (A, C)
∴ f (2 – x) = f (2 + x) ...(i)
Replace x by (2 – x) : f (x) = f(4 – x) ...(ii)
given that f(20 – x) = f(x) ...(iii)
for (ii) and (iii) : f (4 – x) = f(20 – x) ...(iv)
Replace x by 4 – x : f (x) = f (x + 16) ...(v)
In eq. (iii) Replace x by (10 – x) : f (10 + x)
= f (10 – x).
∴ f(x) is symmetrical about line x = 10.