A p-type semiconductor carries net:

CONCEPT:

• Semiconductor: A solid substance that has a conductivity between an insulator and metals.
  • Semiconductors have conductivity due to many factors like the addition of an impurity or because of temperature effects.
• N-type semiconductors: An extrinsic semiconductor where the dopant atoms provide extra conduction electrons to the host material like Phosphorus P in Silicon Si.
  • This creates an excess of negative (n-type) electron charge carriers that are able to move freely.

• P-type semiconductors: A semiconductor, when the impurity with trivalency is added to pure semiconductors, then it is known as a p-type semiconductor.
  • Impurities with trivalency such as Boron (B), Gallium (Ga), Indium(In), Aluminium(Al), etc are called acceptor impurity.

EXPLANATION:

• P-type and N-type materials are NOT positively and negatively charged. 
  • because atoms are electrically neutral.

• ​N-type materials have electrons or negative charges that are majority carriers and holes are minority carriers. 
• So it has mainly electrons or negative charge carriers that can move freely, but it is still neutral because the fixed donor atoms, having donated electrons, are positive.
• Thus we can say that the n-type of semiconductor is neutral.
• Hence option 3 is correct.