This landmark design partnership, formed in London in 1962, was known for its thorough evaluation of a communications problem, the nature of the environmental conditions under which the design was to appear, British wit, and a willingness to try the unexpected:
a. Push Pin studios
b. Chermayeff and Geismar Associates
c. Pentagram
d. Vignelli associates

C. Pentagram

Explanation:

The Pentagram, also called a pentacle or Pentalpha, gets its name from the Greek Penta, meaning “five” and gramma, meaning “a letter”. It is a five-pointed figure, constructed by intersected five straight lines. It is usually associated with femininity, knowledge and also used in Wiccan and Celtic religions.

A pentagram is a five-pointed star, with all lines the same length and all angles the same. A 'pentangle', 'star pentagon', or 'pentalpha' means the same thing. The word pentacle originally meant 'any symbol that protects against evil spirits'. There are many of such symbols, only a few of which include a pentagram.

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