Which of the following expressions will cause an error and why?

Q. Given two lists

L1 = ["this", "is", 'a', "List"]

L2 = ["this", ["is", "another"], "List"]

Which of the following expressions will cause an error and why?

(a)

L1 == L2

(b)

L1.upper ( )

(c)

L1[3].upper()

(d)

L2.upper ()

(e)

L2[1].upper()

(f)

L2[1][1].upper()

Answer =

Expressions that will cause an error:-

(b) (d) & (e) Because upper() function convert only alphabets from smaller alphabets to upper alphabets. But in a given expression L1, L2, L2[1] respectively are list.

Note: - Here L2[1] is nested list.