The phrase "market failure" refers to: (w) the failure of market economies to deal with social problems. (x) the Stock Market Crash of 1929. (y) cases where supplies and demands within private markets yield inefficiency, excessive or inequity instability. (z) logrolling and pork barrel legislation that powerful particular interest groups secure by lobbying.
I need a good answer on the topic of Economic problems. Please give me your suggestion for the same by using above options.