1.  What groovy item was invented by Englishman Edward Craven Walker in 1963?

A. Leisure suit
B. Lava lamp
C. Eight-track tape deck
D. Hot comb

Answer: Option B

Explanation:

Groovy, baby! Lava lamps, which were a fixture in every hip pad in the 1960s and 70s, featured a mixture of water and colored oil that created swirl patterns when heated by a light bulb.