a) longitudinal displacement of one end of member relative to other end is not effectively prevented
b) transverse displacement of one end of member relative to other end is effectively prevented

c) longitudinal displacement of one end of member relative to other end is effectively prevented
d) transverse displacement of one end of member relative to other end is not effectively prevented

Answer: d
Explanation: In sway frame, transverse displacement of one end of member relative to other end is not effectively prevented. Such members and frames occur in structure which depend on flexural action of members to resist lateral loads and sway.