# A typical black hole is always specified by

 [ A ]    a (curvature) singularity [ B ]    a horizon [ C ]    either a (curvature) singularity or a horizen [ D ]    a charge
 Answer : Option C Explanation : Black holes are regions of spacetime from which nothing, not even light, can escape. A typical black hole is the result of the gravitational force becoming so strong that one would have to travel faster than light to escape its pull. Such black holes contain a spacetime singularity at their centre